I think it is version, but what exactly it iss?
what is its importance , where is it used?
G0001 is the actual generation number.
V10 is the version number.
The version number can be used by the programmer to replace an existing GDG while keeping its original position in the generation data group. For example, let's say there are three generations of the GDG:
now, the data in the oldest generation (SAMPLE.GDG.OUTPUT.G0001V00) is determined to be wrong, so the programmer decides to fix the data and replace the original generation. So, he creates a new job to write the output dataset as SAMPLE.GDG.OUTPUT.G0001V01. This new version automatically replaces SAMPLE.GDG.OUTPUT.G0001V00, so now the list looks like this:
Thanks a lot for ur explaination it is really nice of u to share your knowledge on GDG.
This really helped me know about versions and there legitimacy .
But could you help me with some practical jcl listing here u have changed the version for data correction/ recreeation